<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <ul>
      <li v-for="item in list" :key="item.id">{{item.name}}
        <button @click="del(item.id)">删除</button>
      </li>
    </ul>
    <button @click="add">生成</button>
  </div>
  <script src="./vue-2.7.14.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        list: [{ id: 1, name: '1' }, { id: 2, name: '2' }, { id: 3, name: '3' }]
      },
      methods: {
        add() {
          this.list.push({ id: +new Date(), name: Math.floor(Math.random() * 20) })
        },
        del(id) {
          this.list = this.list.filter(item => item.id != id)
        }
      }
    })
  </script>
</body>

</html>